Cheapest priced copy (Fifth Dawn): $0.35 at Card Kingdom, near mint, their price list as of .
Disruption Aura 
Enchantment — Aura · Uncommon · Fifth Dawn · #28
Enchant artifact
Enchanted artifact has "At the beginning of your upkeep, sacrifice this artifact unless you pay its mana cost."
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fifth Dawn | 28 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 1 December 2004Mana cost includes any requirements for colored mana, although most artifacts don’t have any color requirements.
- 1 December 2004If the enchanted artifact has X in its mana cost, X is 0.